var createError = require('http-errors')
var express = require('express')
var path = require('path')
var cookieParser = require('cookie-parser')
var logger = require('morgan')

var indexRouter = require('./routes/index')
var usersRouter = require('./routes/users')
const UserRouter = require('./routes/admin/UserRouter')
const JWT = require('./util/JWT')
const NewsRouter = require('./routes/admin/NewsRouter')
const WebNewsRouter = require('./routes/web/NewsRouter')
const ProductRouter = require('./routes/admin/ProductRouter')

var app = express()

// view engine setup
app.set('views', path.join(__dirname, 'views'))
app.set('view engine', 'jade')

app.use(logger('dev'))
app.use(express.json())
app.use(express.urlencoded({ extended: false }))
app.use(cookieParser())
app.use(express.static(path.join(__dirname, 'public')))

app.use('/', indexRouter)
app.use('/users', usersRouter)
app.use(WebNewsRouter)
/* 
adminapi -后台系统用到
webapi -企业官网用的
*/
app.use((req, res, next) => {
  //如果token有效，next（）
  //如果token过期，返回401错误
  if (req.url === "/adminapi/user/login") {
    next()
    return
  }
  const token = req.headers["authorization"].split(" ")[1]
  if (token) {
    let payload = JWT.verify(token)
    if (payload) {
      const newtoken = JWT.generate({
        _id: payload._id,
        username: payload.username
      }, "1d")
      res.header("Authorization", newtoken)
      next()
    } else {
      res.status(401).send({ errcode: "401", errorInfo: "认证过期，请重新登录" })
    }
  }
})

app.use(UserRouter)
app.use(NewsRouter)
app.use(ProductRouter)


// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404))
})

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message
  res.locals.error = req.app.get('env') === 'development' ? err : {}

  // render the error page
  res.status(err.status || 500)
  res.render('error')
})

module.exports = app
